> Any idea how such a scenario could be implemented? The regulator> framework already has some idea of supply regulators, but it only takes> care of en/disabling the supplies and will not change the voltage on the> supplies. Should this be implemented in the regulator framework? Some> first experiments brought me into a locking hell quite fast.

It's just a case of implementation, but yes the locking is fun. I don'tthink it's that big a deal to rethink it, it's partly complicated sincethe existing locking is designed to be really simple and easy to review.

> For added fun ideally we want to put the LDOs in bypass mode instead of> configuring them for minimum dropout. The bypass mode doesn't work for> the 1.2GHz operating point though since the ripple on the switching> regulator gets too high. So we can't just statically configure bypass> mode but have to enable it dynamically based on the operating points.

I suspect you always want the LDO in there to clean the supply up, it'sjust a more serious issue when more power is being drawn. Having a DCDCdoing most of the voltage drop for efficiency with a LDO to clean up theoutput of the DCDC is pretty common.[unhandled content-type:application/pgp-signature]